[Users] Toward an Extensible Volume Integration Thorn

[Zach Etienne]

Hi Frank, Erik, and Roland.

Thanks for your tips. After many hours of looking into this problem, and
even trying (unsuccessfully) to use Carpet macros, I conclude that I am
being held back by a bug in Cactus scheduling.

I have created a very simple thorn called ScheduleTester that demonstrates
what I believe to be a bug in Cactus scheduling. Since it is 100%
reproducible using this thorn, I have created a bug report (ET Trac #1778)
with the thorn attached. I have also attached the thorn to this email.
Inside the tarball, you'll find the 2015_05 ET release ThornList, with this
thorn included, as well as a .par file in the par/ directory that will
reproduce the bug.

Thanks in advance for helping to take a look at this thorn, and have a
great weekend!

-Zach

*     *     *
Zachariah Etienne
Assistant Professor of Mathematics
West Virginia University

On Tue, May 19, 2015 at 3:29 PM, Frank Loeffler <knarf at cct.lsu.edu> wrote:

> On Tue, May 19, 2015 at 02:27:48PM -0500, Frank Loeffler wrote:
> > We had a similar issue, and as Roland described it is not that simple.
> > In our case we could work around the issue (of either having to put this
> > into C++ code, or having a messy ccl file) but moving all of the calls
> > to ANALYSIS, and putting the two calls for each quantity (local
> > computation followed by reduction) into a separate group. However, I
> > seem to remember (without looking this up now), that this only works in
> > the ANALYSIS cactus bin. Yes, this is unfortunate.
>
> I forgot to mention that one other requirement we had was that we wanted
> to reuse the temporary variables needed for the reductions. So, first
> doing all local computations and then reducing all of them wouldn't
> work. Some of that might have been the reason to move to ANALYSIS too, I
> don't remember.
>
> Frank
>
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